Question 164201
A) All of the following
B) z*conj(z) = [modulus(z)]^2 
C) z + conj(z) = 2a
D) z - conj(z) = 2bi 
E) None of the above 


B) right because (a+bi)(a-bi)=a^2-b^2i^2=a^2+b^2=[modulus(z)]^2 
C) right because (a+bi)+(a-bi)=2a
D) right because (a+bi)-(a-bi)=2bi


A) 3i  size is sqrt(9)=3
B) -7  size is sqrt(49)=7
C) 4   size is sqrt(16)=4
D) -2i size is sqrt(4)=2
E) 4 + 4i size is sqrt(16+16)=sqrt(32)


so the largest is B)